*MAT_099 (SIMPLIFIED_JOHNSON_COOK_ORTHOTROPIC_DAMAGE)
LS-DYNA Input Interface KeywordThis keyword defines an an isotropic elasto-plastic material using the Johnson-Cook material model.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
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*MAT_098 or *MAT_SIMPLIFIED_JOHNSON_COOK_ORTHOTROPIC_DAMAGE | |||||||
mat_ID | E | ν | |||||
a | b | n | c | FAIL |
Definition
Field | Contents | SI Unit Example |
---|---|---|
mat_ID | Material identifier (Integer) |
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Initial density (Real) |
||
E | Young’s modulus (Real) |
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v | Poisson’s ratio Default = 0 (Real) |
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Failure plastic strain. Default = 1030 (Real) |
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a | Yield stress (Real) |
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b | Hardening coefficient (Real) |
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n | Hardening exponent (Real) |
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c | Strain rate coefficient (Real) |
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FAIL | Principal plastic strain to failure (Real) |
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Maximum stress limit (Real) |
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Reference strain rate (Real) |
Comments
- This keyword maps to /MAT/LAW2 (PLAS_JOHNS) and /FAIL/FLD.
- The option “_TITLE” can be added to the end of this keyword. When “_TITLE” is included, an extra 80 character long line is added after the keyword input line which allows an entity title to be defined.